Re: [PATCH] locking/atomic/x86: Introduce try_cmpxchg64

[Peter Zijlstra]

On Tue, May 10, 2022 at 05:42:17PM +0200, Uros Bizjak wrote:
> This patch adds try_cmpxchg64 to improve code around cmpxchg8b.  While
> the resulting code improvements on x86_64 are minor (a compare and a move saved),
> the improvements on x86_32 are quite noticeable. The code improves from:

What user of cmpxchg64 is this?